<template>
   <div class="todo-footer">
        <label>
            <input type="checkbox" :checked="ifCheck" @change="checkOrUncheck" />
        </label>
        <span>
            <span>未完成{{ stasusTaskNum }}</span> / 全部{{ allTaskNum }}
        </span>
        <button class="btn btn-danger" @click="removestatusTask">清除已完成任务</button>
    </div>
</template>
<script>
export default {
    name: 'FootContent',
    props: ['taskArray','checkOrUncheckTask','deleteTaskBystatus'],
    computed: {
        stasusTaskNum() {
            let count = 0;
            this.taskArray.forEach(task => {
                if (task.status) count++
            });
            return count++;
        },
        allTaskNum() {
            return this.taskArray.length;
        },
        ifCheck() {
            return this.statusTaskNum === this.allTaskNum;
        }
    },
    methods: {
        checkOrUncheck(e){
            // console.log(e.target.checked);
            this.checkOrUncheckTask(e.target.checked);
        },
        removestatusTask(){
            this.deleteTaskBystatus();
        }
    },

}
</script>
<style scoped>
.todo-footer {
    height: 40px;
    line-height: 40px;
    padding-left: 6px;
    margin-top: 5px;
}

.todo-footer label {
    display: inline-block;
    margin-right: 20px;
    cursor: pointer;
}

.todo-footer label input {
    position: relative;
    top: -1px;
    vertical-align: middle;
    margin-right: 5px;
}

.todo-footer button {
    float: right;
    margin-top: 5px;
}
</style>